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/* Copyright 2016 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <stdbool.h>
#include <syslog.h>
#include "cras_device_monitor.h"
#include "cras_iodev_list.h"
#include "cras_main_message.h"
enum CRAS_DEVICE_MONITOR_MSG_TYPE {
RESET_DEVICE,
SET_MUTE_STATE,
ERROR_CLOSE,
};
struct cras_device_monitor_message {
struct cras_main_message header;
enum CRAS_DEVICE_MONITOR_MSG_TYPE message_type;
unsigned int dev_idx;
};
static void init_device_msg(struct cras_device_monitor_message *msg,
enum CRAS_DEVICE_MONITOR_MSG_TYPE type,
unsigned int dev_idx)
{
memset(msg, 0, sizeof(*msg));
msg->header.type = CRAS_MAIN_MONITOR_DEVICE;
msg->header.length = sizeof(*msg);
msg->message_type = type;
msg->dev_idx = dev_idx;
}
int cras_device_monitor_reset_device(unsigned int dev_idx)
{
struct cras_device_monitor_message msg;
int err;
init_device_msg(&msg, RESET_DEVICE, dev_idx);
err = cras_main_message_send((struct cras_main_message *)&msg);
if (err < 0) {
syslog(LOG_ERR, "Failed to send device message %d",
RESET_DEVICE);
return err;
}
return 0;
}
int cras_device_monitor_set_device_mute_state(unsigned int dev_idx)
{
struct cras_device_monitor_message msg;
int err;
init_device_msg(&msg, SET_MUTE_STATE, dev_idx);
err = cras_main_message_send((struct cras_main_message *)&msg);
if (err < 0) {
syslog(LOG_ERR, "Failed to send device message %d",
SET_MUTE_STATE);
return err;
}
return 0;
}
int cras_device_monitor_error_close(unsigned int dev_idx)
{
struct cras_device_monitor_message msg;
int err;
init_device_msg(&msg, ERROR_CLOSE, dev_idx);
err = cras_main_message_send((struct cras_main_message *)&msg);
if (err < 0) {
syslog(LOG_ERR, "Failed to send device message %d",
ERROR_CLOSE);
return err;
}
return 0;
}
/* When device is in a bad state, e.g. severe underrun,
* it might break how audio thread works and cause busy wake up loop.
* Resetting the device can bring device back to normal state.
* Let main thread follow the disable/enable sequence in iodev_list
* to properly close/open the device while enabling/disabling fallback
* device.
*/
static void handle_device_message(struct cras_main_message *msg, void *arg)
{
struct cras_device_monitor_message *device_msg =
(struct cras_device_monitor_message *)msg;
switch (device_msg->message_type) {
case RESET_DEVICE:
syslog(LOG_ERR, "trying to recover device 0x%x by resetting it",
device_msg->dev_idx);
cras_iodev_list_suspend_dev(device_msg->dev_idx);
cras_iodev_list_resume_dev(device_msg->dev_idx);
break;
case SET_MUTE_STATE:
cras_iodev_list_set_dev_mute(device_msg->dev_idx);
break;
case ERROR_CLOSE:
syslog(LOG_ERR, "Close erroneous device in main thread");
cras_iodev_list_suspend_dev(device_msg->dev_idx);
break;
default:
syslog(LOG_ERR, "Unknown device message type %u",
device_msg->message_type);
break;
}
}
int cras_device_monitor_init()
{
cras_main_message_add_handler(CRAS_MAIN_MONITOR_DEVICE,
handle_device_message, NULL);
return 0;
}
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